The size of this plane reminds me of my trainer (Sig Kadet LT-40/w tt .46), bigger than the avg. 40 size. So I think that a .46 may fly it, but will limit its performance (probably perfect for pattern flying though).

I read an article where the guy said that his o.s. .50 sx had similar performance with his ys .63. The 63 is ideal for this plane (read that is what I'm flying with), so I bet a 50 would be also. Without the extra power I would definitely be in trouble(case in point, last weekend I was starting knife edge loops in a vertical downline....and hearing all the ruckus behind me; you know, yelling "look out", "pull out", "uh-oh", people grabbing for trash bags, etc.). Man what fun.......

One thing that suprised me last weekend, somehow I got this plane to perform one of the hardest, ugliest snap rolls that I have ever seen. Of course everyone thought I did it on purpose (who am I to say otherwise), but I will make sure it never happens again.

Lots of good tips in the review on the main rcu page (especially which landing gear to get).